Stropping-machine.



J. LORENZEN. STBOPPIN G MACHINE.'

uruonron Hmm In 11, 19m.v

Patntea Apr. 27, 1909.

Inventor 35 illustrated in the accompanying drawing, in

narran sfrarns raras eis-rien.

inns LORENZEN, or rnEMoNr,` oiiio, Assienon'roi-innnin cLAUss, orrREMoNr, OHIO.

sTnoPrINe-Mncninn.

Specification of Letters Patent.

Patented April 27, 1909.

To all whom it may concern:

` Beit known that I, JENS LonnNZnN, a citizen of the United States,residingat Fremont, in the county of Sandusky, State of Ohio, haveinvented certain new and use-` ful Improvements in Stropping-Machines;and I do declare the 'following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and usethe saine, reference being hadto the accompanying drawings, and tothe igures of reference markedthereon,which form. apart ofithis` specification. Y

This invention relates to al stropping niachine designed forstropping.razor blades, and consists in the construction and arrangement ofclaimed. v

The object of the invention is to provide a simple, compact, and`comparatively inexpensive stropping machine of symmetrical appearance,and wherein the arrangement is such as to spread the strepen each sideof the razor holder in a manner to prevent contact of the stroptherewith, whereby provision is made for insuring a perfect operation ofthe device without liability of nicking the strop, the relativeassociation of parts being such as to, present the blade lto the movingstrop in-a position calculated to attaiiithe best results, and to movethe blade quickly from contact with the strop at the instant i of itschange from one position Ato the other.

The above object is attained by the device which A v 4 Figure l is aperspective view of a stropping machine involving my invention, showinga razor in position therein. Fig. 2 is an end elevation of theapparatus. Fig. 3 is a central transverse section through the case andmechanism therein. 4Fig.`4 is a central longitudinal sectiontherethrough as on line 4-4 of Fig. 3. i

Referring to the characters of reference, 1 designates a metal case,preferably of brass, having closed ends and sides and open through thetop and bottom,A the opposed sides of the case swelling outwardly, asshown at 2. Passing longitudinally yof the case and journaledcentrally'A thereinnear the top is an actuating shaft 3; i Alsoc'ross;

parts hereinafter fully set forth and ing the case transverselyandjournaled at its ends therein is a razor holder consisting of aroller or shaft 4 embraced by a sleeve 5 which sleeve carries thelongitudinally eX- teiiding spring jaws 6 that depend below the shaft 4and are adapted to receive the back of a razor blade 7, as clearly shownin Fig. 3, the tension of said spring jaws Vbeing sufiicient to securelyretain the blade in place during the operation of stropping. Upon vtlieouter end of the shaft or roller 4 is a segmental pinion 8, and upon theouter end of the shaft or roller 3 is a crank -arm 9 carrying asegmental rack 10 which meshes with the teeth of said segmental pinion.`Crossing the case longitudinally within the swelled portion `thereofabove the razor holderand upon opposite sides of its center Y ofoscillation, are the strop spreading rollers l1.

The swelled sides of the case converge near the bottom, as shown at 12,and then flare outwardly, as shown at 13, thereby providing a iiaringmouth for4 the case.

The razor strop 14 is looped through the case over the actuating shaft3, the opposite sides of the strop within the case passing over thespreading rollers ll and extending through the mouthof the case onopposite sides of the razor holder, the sides of the strop lying againstthe inner face of the lconverging wallslfZ ofthe case. The length of thestrop is such as to enable it to be drawn longitudinally through thecase by grasping the terminals 15 of the strop and drawing successivelythereon in opposite directions, as will be well understood in the art.This longitudinal movement of the strop through the case will cause itto ride over theshaft 3 and rotate said shaft successively in oppositedirections. As the shaft 3 is rotated, the crank arm 9 thereon will beswung causing the segmental rack of said arm to rotate the segmentalpinion 8 oftheroller or shaft 4 of therazor holder, in a directionvopposite to that in which shaft 3 is rotated. The change of thedirection of movement of the ,strop through the case will change thedirec tion of rotation of the shaft 3 so that as said strop is drawnlongitudinally Vin opposite directions the crank arm 9 will be vibratedand will impart a rocking movement to the razor-holder, causing theblade to swing from side to side, the arrangement being such that theblade will be swung against the side of the strop which is passingoutwardly from the case, the change in the direction of movement of thestrop ope ating to instantly swing the blade against the opposite sidethereof, whereby a perfect honing of the blade may be accomplished.

It will be noted that because of the length of the crank arm 9, theslight rotary movement imparted to the shaft 3 by the t'avel of thestrop thereover is multiplied in the sweep of said crank arm, therebyrocking the razor holder quickly upon its anis of oscillation so as toswing the blade from side to side instantly upon the change of directionin the travel of the strop. Y

The presence of the spreading rollers within the swelled portion of theease prevents the strop from dragging against the rar-or holder andcausing undue friction between said parts likely to interfere with theproperl movement of the razor holder and result in a niclring of thestrop by contact with the blade of the razor when traveling in thewrongl direction. ft will also be evident that by curving the f'alls ofthe :ase outwardly a free passage through the case for the strop isafforded avoiding friction which would otherwise occur between the wallof the case and the strop.

On referring to Fig. 3 it will be, noted that as the strop is drawnlongitudinally through the case it conforms to the flaring wall at themouth thereof and that the razor blade when swung into honing Contacttherewith lies more nearly flat with respect to said st-rop,preventing'by this arrangement the drawing of the strop across the edgeof the blade at too abrupt anangle and allowing the strop to conformmore nearly to the contour of the blade.

Mounted on the end of the cz over the crank arm carrying the segmentalrack and the pinion meshing therewith is a housing 16 which protectssaid parts.

Attached to the top of the case is a hinged bail 17 which enables thestropping machine to be engaged over a hook to suspend it during theoperation of stropping.

lhile l have shown this improved machine applied to the stropping ofordinary razors, l wish it understood, however, that safety razors maybe stropped in this machine by placing the blade of the safety razor ina specially formed tube, not shown, to receive it and inserting the tubebetween the jaws of the bolder in the saine manner that an ordinaryrazor blade is inserted.

Having thus fully set forth my invention, what l claim as new and desireto secure by Let-ters Patent, is z* l. ln a stropping machine, thecombination of a case having outwardly curved side walls, an actuatingshaft journaled in the case near its upper end` a razor holder journaledin the case near its lower end, a st rop looped over the actuatingshaft, the portions of said strop within the -ase lying in opposedrelation, means within the outwardly curved sides of the case forseparating the opposed portions of the strop and holding them away fromthe razor holder, the side walls of the case at the month flaringloutwardly, the portions of the strop passii through said month lyingagainst said flaring walls, and means connecting the razor holder withthe actuating shaft to cause the edge of the blade carried by the holderto successively swing into contact with the portions of the strop lyingagainst the flaring valls of said mouth.

Q. In a stropping machine, the combination of a case having side and endwalls, the side walls of the case at the mouth thereof flaringoutwardly, an actuating shaft journaled in the case near its upper end`a razor holder liournalcd in the case ucar its lower end above theflaring walls of the mouth, a strop looped over the actuating shaft, theportions of the strop within the ase lying in opposed relation andpassing ont of the month of the case over Isaid flaring walls, and meansconnecting the razor holder with the actuating shaft to cause the edgeof the blade in said holder to successively swing into contact with theportions of the strop lying against the flaring walls of said mouth.

Il. ln a stropping machine` the combination of the case, havingoutwardly curved side walls, an actuating shaft journalcd in the caf-enear its upper end. a razor holder `iournaled in the case near its lowerend. a strop looped over said actuating shaft. the portions of the stropwithin the case lying in opposed relation, means within the ouiwardlycurved portion of the case for separating the opposed portions of thestrop and holding theni a Yay from the razor holder, the side walls ofsaid case near the inouth thereof converging to bring the portions ofthe strop within the case more nearly together on opposite sides of therazor blade, and means connecting the razor holder with the actuatingshaft to cause the razor holder to swing from side to side as the stropis drawn longitudinally through the case in opposite directions.

t. A. razor stropping machine, consisting of a case having closed endsand outwardly curved sides. an actuating shaft extending longitudiinillyof the lasy and jonrnaled in the ends thereof, a rock shaft carrying ara'fzor holder journaled in the ends of thel ease below the actuatingshaft, separating rollers within the recesses of the case formed by theoutwardly curved sides thereof and located between the actuating shaftand said rock shaft, a strop looped over the actuating shaft Within theoase and engaged by said separating rollers, and means connecting therook shaft `and the actuatingshaft to cause the razor holder to swingfrom side to side as the strop is drawn longitudinally through the casein opposite directions.

In testimony whereof, I sign this speci cation'in the presence of twoWitnesses.

J ENS LOREN ZEN.

Witnesses:

C. A. THULL, EARL SWEDERSKY.

